CN106894428A - Multi-channel waterproof plugging method for dewatering well of thick and large raft foundation - Google Patents
Multi-channel waterproof plugging method for dewatering well of thick and large raft foundation Download PDFInfo
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- CN106894428A CN106894428A CN201510975913.XA CN201510975913A CN106894428A CN 106894428 A CN106894428 A CN 106894428A CN 201510975913 A CN201510975913 A CN 201510975913A CN 106894428 A CN106894428 A CN 106894428A
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- steel sleeve
- pipe
- closure
- cement
- dewatering well
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 239000004568 cement Substances 0.000 claims abstract description 31
- 239000004567 concrete Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims abstract description 5
- 238000007569 slipcasting Methods 0.000 claims description 34
- 230000000903 blocking effect Effects 0.000 claims description 14
- 239000003673 groundwater Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 8
- 239000011083 cement mortar Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000011396 hydraulic cement Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 2
- 239000000945 filler Substances 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 7
- 239000011372 high-strength concrete Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
- E21B33/146—Stage cementing, i.e. discharging cement from casing at different levels
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A multi-channel waterproof plugging method for a dewatering well of a thick and large raft foundation is characterized in that a steel sleeve with a water stop ring and a plugging plate at the end part and an inner drainage grouting core pipe are used for pouring expanded concrete in the steel sleeve to serve as first plugging; cement paste is quickly injected into the holes of the gravel filler and the peripheral soil body in the dewatering well to form the cement paste filler as a second waterproof plug; the high-strength cement-based grouting material filled at the top of the steel sleeve and the steel flange plugging plate for plugging the top of the steel sleeve are used as a third waterproof plugging, so that three plugging measures are realized, the success rate of primary plugging is high, and the problems of high cost and low efficiency caused by leakage hidden danger of plugging failure and secondary treatment are solved. And the whole precipitation operation of the foundation is not influenced, and the influence on the construction of the main structure is small.
Description
Technical field：
The invention belongs to armored concrete professional skill field, it is related to a kind of mass raft foundation dewatering well
Multi layer waterproof method for blocking.
Background technology：
In existing skyscraper foundation pit dewatering project, indwelling steel being used the dewatering well of buried large-scale ground storehouse more
Sleeve pipe directly uses high-strength concrete or cement injection blocking technology.Existing main technical schemes have following two
Kind：
1st, as shown in Figure 1 in basic shoveling staged construction cement without sandpipe dewatering well, then in construction raft
During plate blinding layer, steel sleeve is set, raft foundation concreting is completed while precipitation is continued,
Possess after stopping well condition, water pump is withdrawn from time, it is sharp with adding the high-strength concrete of early strength agent to insert
Waterproof and plugging effect are played with the water resistance of high-strength concrete itself.
2nd, it is same in construction cushion coat stage indwelling steel sleeve as shown in Figure 2 and stifled in the welding of pipe well end
Plate, possesses after stopping well condition, and Grouting Pipe is set in steel sleeve, and inserts loose rubble, then
Using high-pressure injection pump to grouting methol in pipe, using water under high pressure mud obturator and pipe well periphery
Natural rock-filled consolidation is an entirety, reaches closure and water-stagnating effect.
Both approaches have the following disadvantages：
1st, directly blocked with expansive concrete, easily cause closure failure.
2nd, it is not suitable for the big foundation ditch of groundwater run off.
If the 3, level of ground water rises comparatively fast in concreting process, concrete and cement may be influenceed
The combination of slurry and steel pipe walls, forms penetrating passage, causes seepage, there is security-hidden trouble.
If the 4, once shut-in well failure, after-treatment difficulty is very big, poor reliability, high cost, efficiency
It is low.
The content of the invention：
It is an object of the invention to provide a kind of multi layer waterproof method for blocking of mass raft foundation dewatering well,
This method solve in the case where level of ground water is higher, the matter that raft foundation pipe well closure seepage is present
Amount potential safety hazard and closure unsuccessfully cause poor quality's guarantee of after-treatment and high cost, efficiency low
Problem.
As above conceive, the technical scheme is that：A kind of multiple tracks of mass raft foundation dewatering well is prevented
Water seal blocking method, it is characterised in that：Comprise the following steps：
1. steel sleeve is made：The steel sleeve include body, outer wall seal ring, twice inwall seal ring, on
End flange and end cap；Outer wall seal ring is welded on tube wall, and twice inwall seal ring is respectively welded
In inboard wall of tube body upper and lower end, upper end flange and end cap are arranged on body top；
2. steel sleeve is disposed：In blinding layer construction period, steel sleeve is arranged on cement without sandpipe precipitation
Well top, and the waterproof layer on steel bushing pipe outer wall seal ring and blinding layer is linked to be an entirety；
3. internal drainage slip casting core pipe is set：The internal drainage slip casting core pipe that gate valve and injected hole will be provided with is hung down
Direct-burried enters steel sleeve and cement without in sandpipe dewatering well, and the internal drainage slip casting core pipe is connected with the pipe network that draws water
Formed and continue precipitation system, rubble obturator is then filled in cement is without sandpipe dewatering well, and broken
Separation layer is laid on stone obturator；
4. first closure is completed：With expansive concrete placement in layers and vibrated to pipe inside steel sleeve
Mouth bottom, completes first closure, and carries out concrete curing, during this period using embedding interior row
Water slip casting core pipe maintains precipitation；
5. second closure is completed：After the maintenance of steel sleeve inner concrete, by internal drainage slip casting core pipe and height
Pressure grouting system is connected, and fast hydraulic cement slurry is injected into cement without the rubble filling in sandpipe dewatering well
In body opening gap and the periphery soil body, the basis of bottom is consolidated, form cement mortar obturator, complete second
Closure；Slip casting finishes the gate valve closed in internal drainage slip casting core pipe in time；
6. the closure of the 3rd road is completed：Treat injecting cement paste solidification in internal drainage slip casting core pipe, the observation of foundation ditch periphery
After well level of ground water returns to normal level of ground water, it is ensured that pipe well blocks ne-leakage, at the top of steel sleeve
Filling high-strength cement base grouting material, and steel sleeve top steel flanges closure plate is blocked, complete the 3rd road and prevent
Water seal is blocked up.
Splayed is smeared into above-mentioned blinding layer root, using SBS coiled materials upper overturning mode on bed course by steel
Sleeve outer wall seal ring is linked to be an entirety with bed course waterproof.
Above-mentioned expansive concrete placement in layers is simultaneously vibrated at the 250mm of mouth of pipe bottom, completes first envelope
It is stifled.
Above-mentioned high-strength cement base grouting material is filled in steel sleeve top 250mm scopes.
The invention has the advantages that and good effect：
1st, the present invention realizes phreatic high mass raft foundation precipitation by three road waterproof method for blocking
The non-leakage closure of well, once blocks success rate high, it is to avoid the hidden leakage defect of closure failure and secondary
High cost, the low problem of efficiency that treatment is caused.
1. steel is carried out using a kind of steel sleeve with seal ring and plug at end part plate and internal drainage slip casting core pipe
Expansive concrete is poured as first closure in sleeve pipe；2. it is rapidly injected dewatering well using cement mortar
In interior rubble obturator hole and the periphery soil body, form cement mortar obturator and blocked as second waterproof；
3. using the steel flanges at the top of the high-strength cement base grouting material and closure steel sleeve of the filling of steel sleeve top
Closure plate is blocked as the 3rd road waterproof.
2nd, the utilization of internal drainage slip casting core pipe of the present invention realizes once closure expansive concrete filling process
In continue to precipitation, solve blocking concrete bear too early water pressure formed infiltration hidden danger of quality
Problem.Meanwhile, by setting gate valve in core pipe, it is ensured that slurry dense packing effect in Grouting Pipe.
3rd, the present invention is set by steel sleeve seal ring and blocks leakage passage.
4th, the present invention does not influence basic entirety dewatering operation, influences smaller to main structure construction.
Brief description of the drawings：
Fig. 1 is pipe well high-strength concrete tradition closure first method schematic diagram；
Fig. 2 is pipe well high-strength concrete tradition closure first method schematic diagram；
Fig. 3-1 is the stereogram of method for blocking of the present invention；
Fig. 3-2 is the front view of method for blocking of the present invention；
Fig. 4-1 is the stereogram of steel sleeve；
Fig. 4-2 is the front view of steel sleeve；
Fig. 5 is steel sleeve placement schematic diagram；
Fig. 6 is that internal drainage slip casting core pipe sets schematic diagram；
Fig. 7 is to pour first closure schematic diagram of expansive concrete；
Fig. 8 is slip casting filling second closure schematic diagram；
Fig. 9 is that high-strength cement base grouting and flange fasten the 3rd road closure schematic diagram.
In figure：1-raft board concrete；2-steel sleeve；3-high-strength cement base grouting material；4-C45 is swollen
Swollen concrete；5-rubble obturator；6-internal drainage slip casting core pipe；7-steel flanges closure plate；8—
Cement mortar obturator；9-blocking concrete；10-cement slurry；11-high-pressure slip-casting equipment；12—
Welded still pipe；13-outer wall seal ring；14-inwall seal ring；15-upper end flange and end cap；
16-waterproof roll and protective layer；Smear place's splayed in 17-blinding layer, root；18-cement is without sand
Pipe dewatering well；19-immersible pump；20-gate valve；21-injected hole；22-vacuum pump；23-take out
Grid；24-medium coarse sand separation layer；25-slip casting pond；26-Grouting Pipe.
Specific embodiment：
A kind of multi layer waterproof method for blocking of mass raft foundation dewatering well, comprises the following steps：
1st, steel sleeve makes：
As shown in Fig. 4-1, Fig. 4-2：Making will be arranged at the steel on downcast well pipe top in raft foundation
Sleeve pipe, steel sleeve by welded still pipe 12, outer wall seal ring 13, twice inwall seal ring 14 (close to
Upper and lower end parts), upper end flange and end cap 15 constitute.Outer wall seal ring is welded on tube wall, two
Road inwall seal ring is respectively welded at inboard wall of tube body upper and lower end, and upper end flange and end cap are arranged on pipe
Body top；
2nd, steel sleeve placement：In blinding layer construction period, steel sleeve is arranged on water as shown in Figure 5
Mud smears into splayed without sandpipe downcast well pipe top, blinding layer root, using SBS coiled materials on bed course
Upper overturning mode, an entirety is linked to be by steel bushing pipe outer wall seal ring and bed course waterproof.
3rd, internal drainage slip casting core pipe is set：
Gate valve 20 will be provided with as shown in Figure 6 and the internal drainage slip casting core pipe 6 of injected hole 21 is vertically buried
Enter cement without in sandpipe dewatering well and steel sleeve, internal drainage slip casting core pipe 6 and the pipe network 23 that draws water formed after
Continuous precipitation system, vacuum pump 22 is provided with the pipe network 23 that draws water.Then in cement without sandpipe dewatering well
Rubble obturator 5 is filled in 18, medium coarse sand separation layer 24 is laid on rubble obturator 5.
4th, first closure is completed：
As shown in fig. 7, inside steel sleeve 2 with the placement in layers of C45 expansive concretes 4 and vibrate to
At the 250mm of mouth of pipe bottom, first closure is completed.Curing concrete 3 days, during this period using burying
The internal drainage slip casting core pipe 6 put maintains precipitation, prevents level of ground water from quickly going up to sleeve pipe inner concrete
Impact, it is to avoid form penetrating passage in contact surface.
5th, second closure is completed：
After the maintenance of steel pipe inner concrete reaches 3 days, as shown in Figure 8 using high-pressure slip-casting equipment 11, note
Stock tank 25, Grouting Pipe 26 and internal drainage slip casting core 6, the fast hydraulic cement slurry that will fill swelling agent are quick
It is injected into the hole of rubble obturator 5 and the periphery soil body, consolidates the basis of bottom, forms cement mortar and fill out
Body 8 is filled, second closure is completed.Slip casting finishes the gate valve closed in internal drainage slip casting core pipe 6 in time
20, the slurry and underground water in internal drainage slip casting core pipe are blocked completely so that cement slurry exists in core pipe
Core pipe is blocked after solidification completely.
6th, the closure of the 3rd road is completed：
The injecting cement paste solidification in internal drainage slip casting core pipe is treated, foundation ditch periphery inspection well level of ground water is returned to
After normal level of ground water, it is ensured that pipe well blocks ne-leakage, as shown in Figure 9 in the top 250mm of steel sleeve 2
Scope filling high-strength cement base grouting material 3, and closure steel sleeve top steel flanges closure plate 7 in time, it is complete
Into the 3rd road waterproof closure.
As shown in Fig. 3-1, Fig. 3-2：It is of the invention mainly to be stopped by the inside and outside of the setting in steel sleeve 2
Water ring and end flange, and be respectively adopted expansive concrete 4 blocked as first waterproof, cement mortar
Obturator 8 is blocked as second waterproof, high-strength cement base grouting material 3 and steel flanges closure plate 7 are made
It is the 3rd road waterproof closure, realizes three road close measures.
The present invention shifts to an earlier date pre-buried waterproof steel sleeve in raft foundation, and basic entirety dewatering operation is not influenceed,
Smaller is influenceed on main structure construction.Three road waterproofs closure, once block success rate high, it is to avoid envelope
High cost, the low problem of efficiency that the hidden leakage defect of stifled failure and after-treatment are caused.
Claims (4)
1. a kind of multi layer waterproof method for blocking of mass raft foundation dewatering well, it is characterised in that：
Comprise the following steps：
Make steel sleeve：The steel sleeve includes body, outer wall seal ring, twice inwall sealing
Ring, upper end flange and end cap；Outer wall seal ring is welded on tube wall, twice inwall sealing
Ring is respectively welded at inboard wall of tube body upper and lower end, and upper end flange and end cap are arranged on body top；
Placement steel sleeve：In blinding layer construction period, steel sleeve is arranged on cement without sand
Pipe dewatering well top, and the waterproof layer on steel bushing pipe outer wall seal ring and blinding layer is linked to be one
Individual entirety；
3. internal drainage slip casting core pipe is set：The internal drainage slip casting core pipe that gate valve and injected hole will be provided with is hung down
Direct-burried enters steel sleeve and cement without in sandpipe dewatering well, the internal drainage slip casting core pipe and the pipe network that draws water
Connection is formed and continues precipitation system, and rubble obturator is then filled in cement is without sandpipe dewatering well,
And lay separation layer on rubble obturator；
4. first closure is completed：With expansive concrete placement in layers and vibrated inside steel sleeve
To mouth of pipe bottom, first closure is completed, and carry out concrete curing, during this period using burying
The internal drainage slip casting core pipe put maintains precipitation；
5. second closure is completed：After the maintenance of steel sleeve inner concrete, by internal drainage slip casting core pipe
It is connected with high-pressure slip-casting system, fast hydraulic cement slurry is injected into cement without in sandpipe dewatering well
In rubble obturator hole and the periphery soil body, the basis of bottom is consolidated, forms cement mortar obturator,
Complete second closure；Slip casting finishes the gate valve closed in internal drainage slip casting core pipe in time；
6. the closure of the 3rd road is completed：Treat injecting cement paste solidification, foundation ditch periphery in internal drainage slip casting core pipe
After inspection well level of ground water returns to normal level of ground water, it is ensured that pipe well blocks ne-leakage, in steel
Cannula tip fills high-strength cement base grouting material, and blocks steel sleeve top steel flanges closure plate,
Complete the 3rd road waterproof closure.
2. the multi layer waterproof of a kind of mass raft foundation dewatering well according to claim 1
Method for blocking, it is characterised in that：Splayed is smeared into above-mentioned blinding layer root, using on bed course
Steel bushing pipe outer wall seal ring and bed course waterproof are linked to be an entirety by SBS coiled material upper overturning modes.
3. the multi layer waterproof of a kind of mass raft foundation dewatering well according to claim 1
Method for blocking, it is characterised in that：Above-mentioned expansive concrete placement in layers is simultaneously vibrated to mouth of pipe bottom
At 250mm, first closure is completed.
4. the multi layer waterproof of a kind of mass raft foundation dewatering well according to claim 1
Method for blocking, it is characterised in that：Above-mentioned high-strength cement base grouting material is filled in steel sleeve top
250mm scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975913.XA CN106894428A (en) | 2015-12-21 | 2015-12-21 | Multi-channel waterproof plugging method for dewatering well of thick and large raft foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975913.XA CN106894428A (en) | 2015-12-21 | 2015-12-21 | Multi-channel waterproof plugging method for dewatering well of thick and large raft foundation |
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| Publication Number | Publication Date |
|---|---|
| CN106894428A true CN106894428A (en) | 2017-06-27 |
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ID=59190389
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510975913.XA Pending CN106894428A (en) | 2015-12-21 | 2015-12-21 | Multi-channel waterproof plugging method for dewatering well of thick and large raft foundation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268646A (en) * | 2017-08-04 | 2017-10-20 | 北京建工土木工程有限公司 | A kind of high hydraulic pressure well-covering device for dewatering well and its construction method |
| CN108331996A (en) * | 2018-01-09 | 2018-07-27 | 辽宁省水利水电科学研究院 | A kind of emergent method for blocking of concrete pressure pipeline |
| CN108661058A (en) * | 2018-05-17 | 2018-10-16 | 张国良 | A kind of well burying method |
| CN109519150A (en) * | 2018-12-26 | 2019-03-26 | 中铁十局集团城市轨道工程有限公司 | One kind being directed to the biggish plugging dewatering well device and method of water yield |
| CN109869116A (en) * | 2019-03-07 | 2019-06-11 | 东北大学 | A kind of plugging dewatering well structure and its construction method |
| CN109914452A (en) * | 2019-03-15 | 2019-06-21 | 五冶集团上海有限公司 | Deep well is shunt in a well method in a kind of foundation pit |
| CN114150684A (en) * | 2021-12-29 | 2022-03-08 | 广东省基础工程集团有限公司 | Plugging device for dewatering well and construction method |
| CN116024998A (en) * | 2023-03-16 | 2023-04-28 | 北京城建建设工程有限公司 | Construction method for water-sealing blocking of deep foundation pit dewatering well |
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| JP2004068485A (en) * | 2002-08-08 | 2004-03-04 | Sakamoto Shokai:Kk | Method of forcedly removing surface water in deep well construction method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268646A (en) * | 2017-08-04 | 2017-10-20 | 北京建工土木工程有限公司 | A kind of high hydraulic pressure well-covering device for dewatering well and its construction method |
| CN107268646B (en) * | 2017-08-04 | 2023-03-21 | 北京建工土木工程有限公司 | High-water-pressure-drop well sealing device and construction method thereof |
| CN108331996A (en) * | 2018-01-09 | 2018-07-27 | 辽宁省水利水电科学研究院 | A kind of emergent method for blocking of concrete pressure pipeline |
| CN108331996B (en) * | 2018-01-09 | 2020-02-14 | 辽宁省水利水电科学研究院有限责任公司 | Emergency plugging method for concrete pressure pipeline |
| CN108661058A (en) * | 2018-05-17 | 2018-10-16 | 张国良 | A kind of well burying method |
| CN108661058B (en) * | 2018-05-17 | 2021-05-07 | 张国良 | Water well landfill method |
| CN109519150A (en) * | 2018-12-26 | 2019-03-26 | 中铁十局集团城市轨道工程有限公司 | One kind being directed to the biggish plugging dewatering well device and method of water yield |
| CN109519150B (en) * | 2018-12-26 | 2024-02-06 | 中铁十一局集团城市轨道工程有限公司 | Dewatering well plugging device and method for large water yield |
| CN109869116A (en) * | 2019-03-07 | 2019-06-11 | 东北大学 | A kind of plugging dewatering well structure and its construction method |
| CN109914452A (en) * | 2019-03-15 | 2019-06-21 | 五冶集团上海有限公司 | Deep well is shunt in a well method in a kind of foundation pit |
| CN114150684A (en) * | 2021-12-29 | 2022-03-08 | 广东省基础工程集团有限公司 | Plugging device for dewatering well and construction method |
| CN116024998A (en) * | 2023-03-16 | 2023-04-28 | 北京城建建设工程有限公司 | Construction method for water-sealing blocking of deep foundation pit dewatering well |
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Application publication date: 20170627 |